package com.study.demo.component;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 登录检查
 * @author WS
 */
public class LoginHandleInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object loginuser = request.getSession().getAttribute("loginuser");
        System.out.println(request.getRequestURI());
        if(loginuser==null&&!"/hello".equals(request.getRequestURI())&&!"/error".equals(request.getRequestURI())){
//            未登录
            request.setAttribute("msg","请先登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        }else{
//            已登录放行
            return true;
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
